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    <title>Document</title>
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    <script>
        function data(){
            console.log('123');
            return 1
        }
       let d1= new data()
        console.log(d1);
        user = {name:'郑进豪'};
        user.prototype = function name(){
            console.log('我是user原型函数');
        }
        console.log(user instanceof Object);

    </script>
    
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